Reliable sources are saying iPhone 11 and 11 Pro do include the
hardware for bilateral charging, but that it is software disabled.
Uncertain whether this was removed prior to final production run.

This is the feature that was much-rumored in lead-up to this week, where you could set your AirPods charging case on the back of your iPhone and charge the AirPods case inductively (a.k.a. “wirelessly” but don’t get me started on that).

I wondered in response whether Apple had ever shipped hardware features without mentioning them, only to enable them in a software update later. They have: